#!/bin/bash
#  Copyright (C) 2009-2010  Matias A. Fonzo, <selk@dragora.org>
#  Copyright (C) 2012  Matias A. Fonzo, <selk@dragora.org>
#
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program.  If not, see <http://www.gnu.org/licenses/>.

set -e

CWD=$(pwd)

TMP=${TMP:-/tmp/sources}
OUT=${OUT:-/tmp/packages}

V=1.0.6
ARCH=${ARCH:-i486}
B=2

PKG=${TMP}/package-bzip2

rm -rf $PKG
mkdir -p $PKG $OUT

echo "Uncompressing the tarball..."
rm -rf ${TMP}/bzip2-${V}
lzip -cd ${CWD}/bzip2-${V}.tar.lz | tar -xvf - -C $TMP

cd ${TMP}/bzip2-${V}

# Set sane ownerships and permissions:
chown -R 0:0 .
find . \
 \( -perm 2777 -o \
    -perm 777  -o \
    -perm 775  -o \
    -perm 711  -o \
    -perm 555  -o \
    -perm 511     \
 \) -exec chmod 755 {} + \
  -o \
 \( -perm 666 -o \
    -perm 664 -o \
    -perm 600 -o \
    -perm 444 -o \
    -perm 440 -o \
    -perm 400    \
 \) -exec chmod 644 {} +

# Apply a patch to install the documentation (thanks to LFS):
zcat ${CWD}/patches/bzip2-1.0.5-install_docs-1.patch.gz | patch -p1 --verbose

# Compiles without debug information:
sed -i 's/-g//' Makefile
sed -i 's/-g//' Makefile-libbz2_so

# The following command ensures installation of
# symbolic links are relative (thanks to LFS):
sed -i 's@\(ln -s -f \)$(PREFIX)/bin/@\1@' Makefile

make -f Makefile-libbz2_so
make clean
make
make install PREFIX=${PKG}/usr

mkdir -p ${PKG}/{bin,lib}
cp -a bzip2-shared ${PKG}/bin/bzip2
cp -a libbz2.so* ${PKG}/lib

# Nope:
( cd ${PKG}/usr/bin
  rm -f bzip2 bunzip2 bzcat
  ln -s ../../bin/bzip2 bunzip2
  ln -s ../../bin/bzip2 bzcat
)

mkdir -p ${PKG}/usr/lib
( cd ${PKG}/usr/lib ; ln -sf ../../lib/libbz2.so.?.0 libbz2.so )

# Strip binaries & libraries:
( cd $PKG
  find . -type f | xargs file | awk '/ELF/ && /executable/ || /shared object/' | \
   cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
  find . -type f | xargs file | awk '/current ar archive/' | \
   cut -f 1 -d : | xargs strip --strip-debug 2> /dev/null
)

# Compress and link some man-pages:
gzip -9N ${PKG}/usr/man/man?/*
( cd ${PKG}/usr/man/man1
  ln -sf bzip2.1.gz bzcat.1.gz
  ln -sf bzip2.1.gz bzip2recover.1.gz
)
# Replace hard links:
( cd ${PKG}/usr/man/man1
  ln -sf bzmore.1.gz bzless.1.gz
  ln -sf bzgrep.1.gz bzegrep.1.gz
  ln -sf bzgrep.1.gz bzfgrep.1.gz
  ln -sf bzdiff.1.gz bzcmp.1.gz
)

# Add the documentation:
mkdir -p ${PKG}/usr/doc/bzip2-${V}
cp -a \
 CHANGES LICENSE README README.COMPILATION.PROBLEMS \
 ${PKG}/usr/doc/bzip2-${V}
mv \
 ${PKG}/usr/share/doc/bzip2-${V}/{manual.html,bzip2.txt} \
 ${PKG}/usr/doc/bzip2-${V}
rm -rf ${PKG}/usr/share/doc

# Remove empty directory:
rmdir ${PKG}/usr/share || true

# Copy the description files:
mkdir -p ${PKG}/description
cp ${CWD}/description/* ${PKG}/description

cd $PKG
makepkg -l ${OUT}/bzip2-${V}-${ARCH}-${B}.tlz